Driving device for projection screen and projection equipment

Abstract

The utility model relates to the technical field of projection equipment, and relates to a driving device for a projection screen and projection equipment. The driving device for the projection screen comprises a shell, a winding shaft, a driving mechanism and a reset mechanism, the rolling shaft is rotationally connected to the shell and is used for rolling the projection screen; the driving mechanism is arranged in the shell and is used for driving the projection screen to move on the rolling shaft along a first direction; the reset mechanism comprises a linkage structure, a movable assembly and a reset piece, the linkage structure is in transmission connection with the winding shaft and the movable assembly, the movable assembly is connected to the reset piece, and the reset piece is used for driving the projection screen to move in the direction opposite to the first direction. Compared with a traditional mode that a motor and a reduction gearbox are adopted for driving winding, an additional active driving device is omitted, and passive driving of the reset action is achieved. The driving device is simpler in structure, the number of parts is reduced, the manufacturing and assembling processes are simpler and more convenient, and the production cost and the maintenance difficulty are reduced.

Description

Technical Field

[0001] This application relates to the field of projection equipment technology, and in particular to a driving device for a projection screen and a projection device. Background Technology

[0002] Currently, most common projection screen drive devices on the market use a combination of a motor and a gearbox to achieve screen unfolding and retraction. This structure typically includes a motor drive shaft that drives a take-up shaft to rotate via gear transmission, causing the projection screen to unfold or retract along a specific direction on the take-up shaft. This motor-driven method enables relatively precise and automated control and is widely used in related products such as automotive roll-up projection ceiling screens.

[0003] However, existing motor and gearbox drive structures have certain limitations. First, the overall structure is relatively complex, containing multiple transmission components, and the manufacturing and assembly processes are cumbersome, resulting in higher costs. Second, the drive mechanism is bulky, increasing the overall size and weight of the device, which is detrimental to miniaturization and lightweight design. Furthermore, the reset process of traditional drive devices relies on motor reversal or additional drive mechanisms, increasing system energy consumption and the risk of failure. The complexity of the drive mechanism also makes maintenance and disassembly difficult, reducing product reliability and ease of use. Utility Model Content

[0004] In view of this, this application provides a driving device and projection equipment for projection screens to solve the problem of complex structure caused by the use of motors and gearboxes in the existing projection screen winding schemes.

[0005] The first aspect of this application provides a driving device for a projection screen, comprising:

[0006] case;

[0007] A winding shaft is rotatably connected to the housing and used to wind up the projection screen;

[0008] A drive mechanism, disposed within the housing, is used to drive the projection screen to move along a first direction on the take-up shaft; and

[0009] The reset mechanism includes a linkage structure, a movable component, and a reset element. The linkage structure is connected to the take-up shaft and the movable component, respectively. The movable component is connected to the reset element, and the reset element is used to drive the projection screen to move in the opposite direction to the first direction.

[0010] In one possible implementation, the movable component includes a mounting base and a moving structure, the mounting base being connected to the housing, and the moving structure being kinetically connected to both the mounting base and the reset member, the reset member being used to drive the moving structure to move the take-up shaft in the opposite direction of the first direction.

[0011] In one possible implementation, the moving structure includes a lead screw and a slider. The lead screw is rotatably connected to the mounting base and is driven by the linkage structure. The slider is driven by the lead screw, and a reset member is connected to both the slider and the mounting base. The reset member is used to drive the slider to move relative to the lead screw, thereby driving the projection screen to move in the opposite direction along the first direction.

[0012] In one possible implementation, the mounting base further includes an anti-rotation element, the slider is provided with a positioning portion that slides in engagement with the anti-rotation element, and the anti-rotation element extends at least partially along the axial direction of the lead screw.

[0013] In one possible implementation, the mounting base further includes a first base and a second base, the first base and the second base being respectively connected to the housing, the lead screw being rotatably connected to the first base and the second base respectively, and the slider being located between the first base and the second base, and the reset member being respectively connected to the second base and the slider; wherein, the first base and the anti-rotation member are integrally formed or detachably connected.

[0014] In one possible implementation, the linkage structure includes a first gear and a second gear, the first gear being connected to the take-up shaft and the second gear being connected to the lead screw, with the first gear meshing with the second gear.

[0015] In one possible implementation, the drive mechanism includes a drive component and a take-up component. The drive component is connected to the housing, and the take-up component is tractively connected to the output end of the drive component and the projection screen. The drive component is used to drive the take-up component to move the projection screen along the first direction on the take-up shaft.

[0016] In one possible implementation, the retraction assembly includes a connecting seat and a linkage structure, with the end of the projection screen connected to the connecting seat, and the linkage structure connected to both the drive assembly and the connecting seat. The drive assembly is used to drive the linkage structure to rotate, thereby causing the projection screen to move relative to the rewind shaft.

[0017] In one possible implementation, the linkage structure includes a first link and a second link, one end of the first link being rotatably connected to the drive assembly, the other end of the first link being rotatably connected to the second link, and the end of the second link away from the first link being rotatably connected to the connecting seat.

[0018] A second aspect of this application provides a projection device, comprising:

[0019] Projection screen;

[0020] A projection device for projecting onto the projection screen; and

[0021] The driving device for the projection screen as described in any of the above is used to wind up the projection screen.

[0022] Implementing the embodiments of this application has the following beneficial effects:

[0023] The projection screen driving device of this embodiment includes a reset mechanism comprising a linkage structure, a movable component, and a reset element. When the winding shaft rotates, it drives the linkage structure and the movable component to store kinetic energy in the reset element. When the driving mechanism stops driving or needs to be wound up, the reset element releases the stored kinetic energy, driving the projection screen to reset and wind up in the opposite direction to the driving direction.

[0024] Compared to the traditional method of using a motor and gearbox to drive the winding, this implementation eliminates the need for an additional active drive device, achieving passive drive for the reset action. The drive device in this implementation has a simpler structure, fewer parts, and easier manufacturing and assembly processes, reducing production costs and maintenance difficulty.

[0025] Meanwhile, by eliminating the need for motor reversal or additional drive devices, the overall size and weight are effectively reduced, which is beneficial for the miniaturization and lightweight design of the projection screen device. Furthermore, the use of a reset element for energy storage and release reduces system energy consumption and the risk of failure, improving the device's reliability and ease of use. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A perspective view of a projection screen driving device according to an embodiment of the present invention is shown;

[0028] Figure 2 It shows Figure 1 A magnified view of part A in the middle;

[0029] Figure 3 An exploded view of the reset mechanism in an embodiment of this utility model is shown;

[0030] Figure 4 A schematic diagram of the drive mechanism in an embodiment of this utility model is shown.

[0031] Figure label:

[0032] 10. Driving device for projection screen;

[0033] 100. Shell;

[0034] 200. Reel;

[0035] 300. Drive mechanism; 310. Drive assembly; 311. Drive motor; 312. Transmission structure; 320. Retraction assembly; 321. Connecting seat; 322. Linkage structure; 3221. First link; 3222. Second link;

[0036] 400. Reset mechanism; 410. Linkage structure; 411. First gear; 412. Second gear; 420. Movable component; 421. Mounting base; 4211. Anti-rotation component; 4212. First seat body; 4213. Second seat body; 4221. Lead screw; 4222. Slider; 42221. Positioning part; 430. Reset component. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] Currently, most common projection screen drive devices on the market use a combination of a motor and a gearbox to achieve screen unfolding and retraction. This structure typically includes a motor drive shaft that drives a take-up shaft to rotate via gear transmission, causing the projection screen to unfold or retract along a specific direction on the take-up shaft. This motor-driven method enables relatively precise and automated control and is widely used in related products such as automotive roll-up projection ceiling screens.

[0039] However, existing motor and gearbox drive structures have certain limitations. First, the overall structure is relatively complex, containing multiple transmission components, and the manufacturing and assembly processes are cumbersome, resulting in higher costs. Second, the drive mechanism is bulky, increasing the overall size and weight of the device, which is detrimental to miniaturization and lightweight design. Furthermore, the reset process of traditional drive devices relies on motor reversal or additional drive mechanisms, increasing system energy consumption and the risk of failure. The complexity of the drive mechanism also makes maintenance and disassembly difficult, reducing product reliability and ease of use.

[0040] Specifically, for automotive roll-up projection ceiling screens, the screen's retraction and extension are typically driven by a combination of a motor and a gearbox. In this geared motor assembly, the brushless motor, after starting, obtains the required speed and driving torque via a gear reduction mechanism; the final gear is directly connected to the screen's main shaft, driving the screen to retract. The gearbox's main functions include reducing the speed to adapt to operational requirements and amplifying the motor's output torque to meet the mechanical requirements of the working end. The worm gear is generally made of copper or stainless steel, while the gears are mostly made of metal or synthetic plastics. These parts are all precision-manufactured components, and the large number of parts, complex dimensions, and strict requirements result in significant challenges in process control and reduced overall system controllability.

[0041] Based on this, see Figures 1 to 4 As shown, this utility model embodiment provides a driving device 10 for a projection screen, which includes a housing 100, a take-up shaft 200, a driving mechanism 300, and a reset mechanism 400. The housing 100 serves as a mounting carrier for connection with external components. The take-up shaft 200 is rotatably connected to the housing 100 and is used to take up the projection screen. The driving mechanism 300 is disposed inside the housing 100 and is used to drive the projection screen to move along a first direction on the take-up shaft 200. The reset mechanism 400 includes a linkage structure 410, a movable component 420, and a reset member 430. The linkage structure 410 is respectively driven to the take-up shaft 200 and the movable component 420. The movable component 420 is connected to the reset member 430. The reset member 430 is used to drive the projection screen to move in the opposite direction to the first direction.

[0042] The projection screen drive device 10 of this embodiment includes a reset mechanism 400, which comprises a linkage structure 410, a movable component 420, and a reset member 430. When the winding shaft 200 rotates, it drives the linkage structure 410 and the movable component 420 to store kinetic energy in the reset member 430. When the drive mechanism 300 stops driving or needs to be wound up, the reset member 430 releases the stored kinetic energy, driving the projection screen to reset and wind up in the opposite direction to the driving direction.

[0043] Compared to the traditional method of using a motor and gearbox to drive the winding, this implementation eliminates the need for an additional active drive device, achieving passive drive for the reset action. The drive device in this implementation has a simpler structure, fewer parts, and easier manufacturing and assembly processes, reducing production costs and maintenance difficulty.

[0044] Meanwhile, by eliminating the need for motor reversal or additional drive devices, the overall size and weight are effectively reduced, which is beneficial for the miniaturization and lightweight design of the projection screen device. Furthermore, the use of a reset element 430 for energy storage and release reduces system energy consumption and failure risk, improving the device's reliability and ease of use.

[0045] See Figure 2 As shown in the figure, the X direction can be considered as the first direction, that is, the axial direction of the projection screen rotating along the rewind axis 200; the Y direction can be regarded as the direction in which the drive mechanism 300 drives the projection screen to unfold; the Z direction represents the width direction of the drive device 10 for the projection screen.

[0046] The operating principle of the projection screen drive device 10 is as follows: When the drive mechanism 300 drives the projection screen to unfold along the Y direction, the driving force is transmitted to the take-up shaft 200 through the drive mechanism 300, causing the take-up shaft 200 to rotate. The rotation of the take-up shaft 200 transmits power to the movable component 420 through the linkage structure 410. Under the drive of the linkage structure 410, the movable component 420 moves along the X direction and does work on the reset component 430, causing the reset component 430 to store mechanical energy. This process completes the unfolding of the projection screen and simultaneously realizes the energy accumulation of the reset component 430.

[0047] When the driving force of the drive mechanism 300 is removed, the reset component 430 releases the stored energy, generating a driving torque that causes the take-up shaft 200 to rotate in the opposite direction to the first direction, thereby driving the projection screen to automatically rewind and achieving the reset action. This design makes full use of the storage and release of mechanical energy, avoiding the energy consumption and complexity of traditional methods that rely on motor reversal or additional drive devices.

[0048] It should be noted that in some specific embodiments, the driving direction of the reset member 430 can be set to be opposite to that described above, that is, the reset member 430 drives the projection screen to unfold, while the driving mechanism 300 drives the projection screen to retract. This design scheme can be flexibly determined according to the actual design requirements of the driving device 10 for the projection screen and does not constitute a limitation.

[0049] In one embodiment, the reset element 430 can be a helical spring as an energy storage element. Helical springs have a simple structure, stable elastic recovery performance, and can efficiently store and release mechanical energy. They also have the advantages of low manufacturing cost, ease of processing and installation. Furthermore, the elastic coefficient and size of the helical spring can be adjusted according to the weight of the specific projection screen and the required reset torque, flexibly adapting to different specifications of drive devices to ensure a smooth and reliable reset action.

[0050] In other embodiments, the reset element 430 may also be a rubber block as an elastic energy storage element. Rubber blocks possess excellent elastic cushioning properties and fatigue resistance, enabling a gentler energy release, reducing mechanical impact, and improving the system's service life and reliability. Furthermore, rubber materials are easy to mold, making them suitable for device designs with complex spatial layouts.

[0051] In addition, the reset element 430 can also employ a hydraulic energy storage device such as a hydraulic rod. The hydraulic rod stores and transfers energy through the compression and release of hydraulic oil, providing a larger reset torque and a smoother reset process, making it suitable for applications requiring high reset force or where the reset action needs buffered control. Although the hydraulic rod has a relatively complex structure, it can significantly improve the performance of the device in specific applications.

[0052] It should be noted that different types of reset components 430 each have their own advantages and disadvantages. The specific selection should be based on a comprehensive consideration of factors such as the structural dimensions of the projection screen drive device 10, the required reset torque, manufacturing costs, and the usage environment. No single limitation is made here. Using various reset component forms such as helical springs, rubber blocks, or hydraulic rods can meet different design requirements and increase the applicability and flexibility of this utility model.

[0053] Specifically, the movable component 420 includes two parts: a mounting base 421 and a moving structure. The mounting base 421 is fixedly connected to the housing 100, serving to securely install the movable component 420 in the overall drive device 10. The mounting base 421 serves as the mounting carrier for the moving structure, ensuring that the moving structure can move stably under the action of the reset member 430 and the linkage structure 410.

[0054] During assembly, the mounting base 421 not only serves as an internal connector but can also be positioned externally to the housing 100. The movable components 420 are pre-assembled in a modular fashion before being connected to the housing 100. This design effectively improves the convenience and efficiency of assembly, facilitates mass production and maintenance disassembly, reduces assembly difficulty and maintenance costs, and simultaneously enhances the maintainability and reliability of the product.

[0055] The moving structure is connected to the mounting base 421 and the reset member 430 respectively. Under the driving action of the linkage structure 410, the moving structure generates a relative displacement relative to the mounting base 421, thereby doing work on the reset member 430 and storing energy in the reset member 430. Specifically, the linkage structure 410 drives the mounting base 421 to generate relative motion with respect to the moving structure through the rotation of the take-up shaft 200. The motion of the moving structure causes the reset member 430 to undergo elastic deformation or energy accumulation, thereby realizing the storage of mechanical energy.

[0056] After the reset component 430 completes its energy storage, it releases energy to drive the moving structure to move in the opposite direction. This, in turn, drives the rewind shaft 200 to rotate in the opposite direction along the first direction via the linkage structure 410, thereby resetting and rewinding the projection screen. This design fully utilizes the motion conversion function of the moving component 420 to ensure the efficiency and reliability of the reset action.

[0057] It should be noted that the specific form of the moving structure can be flexibly designed according to actual needs, such as sliders, levers, linkage mechanisms, etc., and the number can be one, two, or more. The coordinated operation of multiple moving structures can improve the stability and energy transfer efficiency of the reset mechanism. The material and structural form of the mounting base 421 can also be optimized according to the size and load requirements of the drive device 10 to ensure the rigidity and durability of the overall structure.

[0058] In one embodiment, the moving structure includes a lead screw 4221 and a slider 4222. The lead screw 4221 is rotatably connected to the mounting base 421 and is also driven by the linkage structure 410, allowing the lead screw 4221 to rotate relative to the mounting base 421 under the driving action of the linkage structure 410. The slider 4222 is driven by the lead screw 4221. A reset member 430 is connected to both the slider 4222 and the mounting base 421. The reset member 430 drives the slider 4222 to move relative to the lead screw 4221 by storing elastic energy, thereby driving the projection screen to move in the opposite direction along the first direction, i.e., a rewinding action.

[0059] In actual operation, the linkage structure 410 drives the lead screw 4221 to rotate. The lead screw 4221 is connected to the slider 4222 via a thread, causing the slider 4222 to move axially along the lead screw 4221. Simultaneously, the movement of the slider 4222 applies a force to the reset member 430, causing the reset member 430 to store mechanical energy. When the driving mechanism 300 removes the driving force, the reset member 430 releases the stored energy, driving the slider 4222 to move in the opposite direction of the first direction, thereby causing the projection screen to rewind and achieving the reset function.

[0060] The transmission structure employing lead screw 4221 and slider 4222 offers several advantages: high transmission efficiency, effectively reducing energy loss; smooth transmission, ensuring smooth and stable reset actions; and low noise, enhancing product comfort and user experience. Furthermore, the mechanical transmission of lead screw 4221 and slider 4222 facilitates precise linear motion control compared to conventional gear transmissions, and is easier to adjust and maintain.

[0061] To ensure the stability of the lead screw 4221 during rotation and reduce friction, the lead screw 4221 and the mounting base 421 can be connected via bearings. Various types of bearings can be used, such as self-lubricating bearings or bushings; the specific selection can be flexibly determined based on product design requirements, space constraints, and cost considerations, and is not limited to a single type. Using bearings not only reduces frictional resistance but also improves the rotational accuracy and service life of the lead screw 4221, further enhancing the reliability and durability of the drive unit.

[0062] Furthermore, the mounting base 421 also includes an anti-rotation member 4211, and the slider 4222 is provided with a positioning part 42221. The positioning part 42221 is slidably engaged with the anti-rotation member 4211, and the anti-rotation member 4211 extends at least partially along the axial direction of the lead screw 4221. The purpose of this structural design is to ensure that when there is relative movement between the lead screw 4221 and the slider 4222, the slider 4222 can move accurately along the axial direction of the lead screw 4221, while preventing the slider 4222 from rotating or deviating, thereby ensuring the stability and accuracy of the transmission.

[0063] Specifically, the positioning part 42221 can be designed as a planar structure or a slider shape, forming a sliding fit with the anti-rotation member 4211. The sliding fit between the planar positioning part 42221 and the anti-rotation member 4211 can effectively limit the rotation of the slider 4222 around the lead screw 4221, ensuring that it moves linearly only along the axis of the lead screw. This design not only improves the transmission efficiency between the lead screw and the slider, but also reduces transmission errors and mechanical wear caused by slider rotation, extending the service life of the device.

[0064] The extension length of the anti-rotation component 4211 along the axial direction of the lead screw 4221 and its fitting clearance with the positioning part 42221 need to be reasonably designed to ensure smooth sliding and prevent lateral wobbling. Through the cooperation between the anti-rotation component 4211 and the positioning part 42221, the movement of the lead screw 4221 and the slider 4222 can be precisely guided, effectively improving the stability and reliability of the reset mechanism and ensuring that the reset action is smooth and accurate.

[0065] In summary, the cooperative structure of the anti-rotation component 4211 and the positioning part 42221 provides necessary guidance and positioning support for the transmission system of the lead screw 4221 and the slider 4222, further optimizing the mechanical performance of the reset mechanism and meeting the technical requirements of the projection screen drive device 10 for efficient, stable and reliable transmission.

[0066] Specifically, the mounting base 421 further includes a first base body 4212 and a second base body 4213, which are respectively connected to the housing 100. A lead screw 4221 is rotatably connected to the first base body 4212 and the second base body 4213, and a slider 4222 is located between the first base body 4212 and the second base body 4213. A reset member 430 is connected to the second base body 4213 and the slider 4222. The first base body 4212 and the anti-rotation member 4211 can be integrally formed or can adopt a detachable connection structure.

[0067] In this embodiment, the first support body 4212 and the second support body 4213 provide support for both ends of the lead screw 4221, ensuring the stability and coaxiality of the lead screw 4221 during rotation and preventing the lead screw from affecting transmission accuracy due to uneven force or twisting. To further reduce rotational resistance and improve transmission efficiency, the lead screw 4221 can be rotatably connected to the first support body 4212 and the second support body 4213 through bearings. The use of bearings effectively reduces friction and wear, extending the service life of the lead screw 4221 and related components.

[0068] When the first seat 4212 and the anti-rotation component 4211 adopt a detachable structure, the anti-rotation component 4211 may wear out during long-term use due to its sliding contact with the slider 4222. This design allows for the replacement of the anti-rotation component 4211 separately without replacing the entire mounting base 421, reducing maintenance costs and improving maintenance convenience. Furthermore, the first seat 4212 and the anti-rotation component 4211 can be made of different materials to further optimize performance. For example, the first seat 4212 can be made of high-strength materials such as stainless steel or aluminum alloy to ensure overall structural strength and rigidity; while the anti-rotation component 4211 can be made of low-friction materials such as Teflon (PTFE), significantly reducing friction and wear between the anti-rotation component 4211 and the slider 4222, improving transmission smoothness and service life.

[0069] Conversely, when the first seat 4212 and the anti-rotation component 4211 are integrally formed, the strength and stability of the overall component are improved through one-time processing, reducing assembly steps and increasing assembly convenience. At the same time, the integrally formed structure avoids assembly errors and loose connections, which helps improve the reliability and durability of the drive device.

[0070] In one embodiment, the linkage structure 410 includes a first gear 411 and a second gear 412, wherein the first gear 411 is connected to the take-up shaft 200, and the second gear 412 is connected to the lead screw 4221, and the first gear 411 and the second gear 412 mesh to realize power transmission. Specifically, the first gear 411 and the second gear 412 can adopt a spur gear structure. The spur gear structure has a mature processing technology, high transmission efficiency, simple structure, is easy to manufacture and maintain, and is suitable for transmitting large torques and operating smoothly.

[0071] In some embodiments, the gears of the linkage structure 410 can also be helical gears. Compared to spur gears, helical gears have tooth surfaces at a certain angle, resulting in more continuous meshing, smoother transmission, and lower noise. They can effectively reduce the impact and vibration during gear meshing, making them suitable for applications requiring high levels of quietness and smooth transmission. However, helical gears require additional axial support due to the presence of axial force, making their structure relatively complex and their manufacturing cost slightly higher.

[0072] In other embodiments, the linkage structure 410 can also use two friction wheels instead of gear meshing. Friction wheel transmission achieves power transmission through the friction between the wheel surfaces, resulting in a simpler structure, lower manufacturing cost, and the ability to achieve stepless speed regulation and buffer protection to a certain extent, reducing transmission shock and noise. However, the transmission efficiency of friction wheel transmission is greatly affected by the coefficient of friction, and it is susceptible to wear and slippage, resulting in lower transmission accuracy and reliability compared to gear transmission.

[0073] Specifically, the drive mechanism 300 includes a drive component 310 and a retraction component 320. The drive component 310 is fixedly connected to the housing 100 and serves as the power source and output of the driving force. The retraction component 320 is connected to the output of the drive component 310 and the projection screen, respectively, and is responsible for transmitting the power output by the drive component 310 to the projection screen.

[0074] The drive component 310 provides power to the retraction component 320 through its output end, driving the retraction component 320 to rotate the projection screen along the rewind shaft 200. Specifically, the retraction component 320, through its connection with the projection screen, causes the projection screen to undergo linear unfolding motion relative to the rewind shaft 200, while this motion causes the rewind shaft 200 to rotate around its axis, thus realizing the retraction and unfolding function of the projection screen.

[0075] Power is provided by the drive component 310, and the retraction component 320 effectively drives the projection screen, enabling the projection screen to unfold or retract smoothly, thereby rotating the retraction shaft 200. This design not only ensures precise control of the projection screen's unfolding and retraction movements but also provides a foundation for structural optimization and energy consumption control of the entire drive device 300.

[0076] It should be noted that the specific type of drive component 310 can be a motor (such as a brushless DC motor, stepper motor, etc.) or other power device, and the specific selection is determined based on product performance indicators, cost, and application environment; the connection method and transmission mechanism of retraction component 320 can also be adjusted according to actual design requirements and are not limited thereto. By reasonably configuring drive component 310 and retraction component 320, efficient, reliable, and energy-saving retraction control of the projection screen drive device 10 can be achieved.

[0077] In one embodiment, the retracting assembly 320 includes a connecting seat 321 and a connecting rod structure 322, wherein the connecting seat 321 is used to fix the end of the projection screen so that the projection screen can be stably connected to the retracting mechanism of the drive device 10, ensuring that the projection screen maintains the correct position and tension during the unfolding and rewinding process.

[0078] The linkage structure 322 is connected to the drive assembly 310 and the connecting seat 321 respectively, serving as a key component for power transmission and motion conversion. The drive assembly 310 drives the linkage structure 322 to rotate, and the linkage structure 322 causes the connecting seat 321 and the end of the projection screen connected thereto to move relative to the rewind shaft 200, thereby realizing the linear unfolding or rewinding action of the projection screen.

[0079] The design employing the linkage structure 322 effectively reduces the overall size of the unfolding component 320, making the structure more compact and easier to integrate into limited spaces. Through reasonable mechanical transmission and motion conversion, the linkage structure 322 efficiently transmits the rotational power of the drive component 310 to the connecting base 321, ensuring smooth and accurate unfolding and rewinding of the projection screen.

[0080] Furthermore, the materials and structural form of the linkage structure 322 can be selected according to specific design requirements. For example, lightweight alloy materials can be used to reduce weight, or multi-section linkages can be used to meet complex motion trajectories, improving the adaptability and reliability of the drive device. A well-designed linkage structure 322 can also reduce mechanical friction and wear, extend service life, and facilitate maintenance and replacement.

[0081] Specifically, the linkage structure 322 includes a first linkage 3221 and a second linkage 3222. One end of the first linkage 3221 is rotatably fixed to the output shaft of the drive assembly 310, and the other end is rotatably connected to the second linkage 3222. The end of the second linkage 3222 away from the first linkage 3221 is rotatably fixed to the connecting seat 321, which is used to fix the end of the projection screen.

[0082] The drive assembly 310 drives the first link 3221 to rotate. The rotational motion of the first link 3221 is transmitted to the second link 3222 through a rotary connection, causing the second link 3222 to oscillate or reciprocate, thereby driving the connecting seat 321 to move forward or backward along the Y direction. This linear movement in the Y direction corresponds to the unfolding or retracting action of the projection screen.

[0083] This structural design utilizes the mechanical transmission characteristics of the linkage to effectively convert the rotational power of the drive assembly 310 into the linear motion of the connecting seat 321, ensuring that the end of the projection screen moves smoothly along a predetermined trajectory during the unfolding and retraction process. The reasonable length and connection method of the first linkage 3221 and the second linkage 3222 can adjust the motion amplitude and transmission ratio of the drive mechanism to meet the requirements of different projection screen specifications and unfolding / rewinding, thereby improving the adaptability and flexibility of the device.

[0084] Through the configuration of the linkage structure 322, the drive mechanism 300 achieves high efficiency in power transmission and compactness in structure, avoids complex multi-stage transmission devices, reduces manufacturing costs and maintenance difficulty, and at the same time ensures the accuracy and stability of the projection screen's unfolding and rewinding movements.

[0085] In one embodiment, the drive assembly 310 includes a drive motor 311 and a transmission structure 312. The drive motor 311 serves as a power source, providing stable and controllable rotational power to ensure that the drive mechanism 300 of the projection screen drive device 10 has good response speed and output torque.

[0086] The transmission structure 312 can be composed of multiple sets of gears connected in sequence, achieving a reasonable match between speed and torque through multi-stage gear transmission. Specifically, multi-stage gear transmission can effectively reduce the high-speed rotation output of the motor, converting it into a lower-speed, high-torque output suitable for driving the unfolding component 320, ensuring the smoothness and reliability of the projection screen during unfolding and rewinding.

[0087] The design of multiple gears connected in sequence not only improves the flexibility of gear ratio adjustment, but also optimizes drive efficiency through reasonable gear combinations, reducing energy loss and noise. At the same time, the selection of gear materials and processing technology (such as using metal gears or high-performance engineering plastic gears) can be adjusted according to actual needs to balance strength, wear resistance, and cost control.

[0088] The process characteristics and assembly process of the main components of the projection screen driving device 10 in this embodiment are described in detail below:

[0089] The first gear 411 and the second gear 412 can be manufactured using powder metallurgy. Powder metallurgy has the advantages of simple process, high forming accuracy, high material utilization rate, and easy mass production of complex tooth profiles. It can effectively ensure the dimensional accuracy and mechanical properties of gears, is suitable for large-scale mass production, and has good cost control and stable and reliable process.

[0090] Mounting bracket 421 is manufactured by first producing a blank using a die-casting process, and then finishing the bearing mounting position through precision machining. Die-casting can quickly form complex-shaped metal parts, ensuring the geometric accuracy and structural strength of the product, and is suitable for mass production. Precision machining of the bearing mounting position ensures the assembly accuracy and operational stability of the bearing. The overall process combination is simple and efficient, facilitating product consistency and quality control.

[0091] The anti-rotation component 4211 is manufactured using a die stamping process, which is highly efficient, low-cost, and produces stable finished product dimensions, making it suitable for mass production. Simultaneously, the stamped part possesses good mechanical strength and surface quality, meeting the performance requirements for the sliding fit between the anti-rotation component and the slider 4222.

[0092] In addition, all other parts of the device are procured and used as standard parts. Standard parts have mature process guarantees and stable quality, which facilitates supply chain management and further simplifies the manufacturing process.

[0093] In terms of mechanism assembly, the gear and lead screw 4221 are connected by press-fitting, occupying one assembly step, ensuring a firm connection and reliable transmission. The mounting base 421 and bearing are first connected as a whole by press-fitting, and then the lead screw 4221 is pressed into this whole, occupying two steps. This process arrangement ensures the rigidity and motion accuracy of the mechanism. The anti-rotation component 4211 is directly connected to the first base 4212 by screws, occupying one step, which facilitates subsequent maintenance and replacement, and improves the flexibility of assembly and the convenience of maintenance.

[0094] Overall, the manufacturing of the drive device components of this utility model employs mature and common technologies, with a simple and reasonable process flow that is easy for mass production and ensures stable and reliable operation. The assembly process is equally simple and efficient, requiring only common tools and fixtures, eliminating the need for special processing equipment and complex processes. This significantly reduces production costs and manufacturing difficulty while ensuring the stability of component performance parameters and the overall reliability of the device. The design fully considers the feasibility of manufacturing and assembly, making it suitable for large-scale industrial production.

[0095] This utility model also provides a projection device, which includes a projection screen, a projection device, and a projection screen driving device 10 in any of the above embodiments; the projection device is used to project onto the projection screen; the projection screen driving device 10 is used to rewind the projection screen.

[0096] Specifically, in this embodiment, the projection screen driving device 10 includes a reset mechanism 400, which comprises a linkage structure 410, a movable component 420, and a reset member 430. The rotation of the projection screen rewind shaft 200, driven by the driving mechanism 300, moves the linkage structure 410 and the movable component 420, storing kinetic energy in the reset member 430. When the driving mechanism 300 stops driving or rewinding is required, the reset member 430 releases the stored kinetic energy, causing the projection screen to reset and rewind in the opposite direction to the driving direction.

[0097] Compared to the traditional method of using a combination of motor and gearbox to drive the winding mechanism commonly found in projection equipment, this implementation eliminates the need for an additional active drive device, achieving passive drive for the reset action. This design simplifies the structure of the drive device, significantly reduces the number of parts, and thus reduces the complexity of manufacturing and assembly processes, thereby lowering production costs and reducing the difficulty of later maintenance.

[0098] Furthermore, omitting motor reversal or other additional drive devices effectively reduces the overall size and weight of the drive unit, which is beneficial for miniaturization and lightweight design of projection equipment, meeting the application needs of modern portable or space-constrained environments.

[0099] Through the energy storage and release mechanism of the reset component 430, this implementation scheme effectively reduces the system's energy consumption, avoids the energy waste and complex control caused by traditional motor reversal, reduces the risk of failure, and improves the overall reliability of the device. At the same time, the simplicity of the structure and the modular design also greatly improve the ease of use and maintenance of the device.

[0100] In summary, by combining the projection screen driving device 10 in any of the above embodiments, the projection device provided by this utility model not only achieves efficient and stable projection screen retraction and extension, but also significantly optimizes the structure, performance and cost of the device through an innovative passive reset mechanism, meeting the market demand for high-performance, low-energy-consumption and high-reliability projection applications, and can be applied to related scenarios such as vehicle projection.

[0101] In the description of the embodiments of this application, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0102] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0103] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0104] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0105] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A driving device for a projection screen, characterized in that, include: case; A winding shaft is rotatably connected to the housing and used to wind up the projection screen; A drive mechanism is provided inside the housing and is used to drive the projection screen to move along the first direction on the take-up shaft; as well as The reset mechanism includes a linkage structure, a movable component, and a reset element. The linkage structure is connected to the take-up shaft and the movable component, respectively. The movable component is connected to the reset element, and the reset element is used to drive the projection screen to move in the opposite direction to the first direction.

2. The driving device for a projection screen according to claim 1, characterized in that, The movable component includes a mounting base and a moving structure. The mounting base is connected to the housing, and the moving structure is kinetically connected to both the mounting base and the reset member. The reset member is used to drive the moving structure to move so that the take-up shaft moves in the opposite direction to the first direction.

3. The driving device for a projection screen according to claim 2, characterized in that, The moving structure includes a lead screw and a slider. The lead screw is rotatably connected to the mounting base and is also driven by the linkage structure. The slider is driven by the lead screw, and the reset member is connected to both the slider and the mounting base. The reset member is used to drive the slider to move relative to the lead screw, thereby driving the projection screen to move in the opposite direction along the first direction.

4. The driving device for a projection screen according to claim 3, characterized in that, The mounting base also includes an anti-rotation component, the slider is provided with a positioning part, the positioning part is slidably engaged with the anti-rotation component, and the anti-rotation component extends at least partially along the axial direction of the lead screw.

5. The driving device for a projection screen according to claim 4, characterized in that, The mounting base further includes a first base and a second base, which are respectively connected to the housing. The lead screw is rotatably connected to the first base and the second base, and the slider is located between the first base and the second base. The reset member is connected to the second base and the slider. The first base and the anti-rotation member are integrally formed or detachably connected.

6. The driving device for a projection screen according to any one of claims 3-5, characterized in that, The linkage structure includes a first gear and a second gear. The first gear is connected to the take-up shaft, and the second gear is connected to the lead screw. The first gear meshes with the second gear.

7. The driving device for a projection screen according to any one of claims 1-5, characterized in that, The driving mechanism includes a driving component and a take-up / deployment component. The driving component is connected to the housing, and the take-up / deployment component is respectively connected to the output end of the driving component and the projection screen. The driving component is used to drive the take-up / deployment component to move the projection screen along the first direction on the take-up shaft.

8. The driving device for a projection screen according to claim 7, characterized in that, The retraction assembly includes a connecting base and a linkage structure. The end of the projection screen is connected to the connecting base, and the linkage structure is connected to the drive assembly and the connecting base respectively. The drive assembly is used to drive the linkage structure to rotate, so as to move the projection screen relative to the rewind shaft.

9. The driving device for a projection screen according to claim 8, characterized in that, The linkage structure includes a first linkage and a second linkage. One end of the first linkage is rotatably connected to the drive assembly, and the other end of the first linkage is rotatably connected to the second linkage. The end of the second linkage away from the first linkage is rotatably connected to the connecting seat.

10. A projection device, characterized in that, include: Projection screen; A projection device for projecting onto the projection screen; as well as The projection screen driving device according to any one of claims 1-9, wherein the projection screen driving device is used to wind up the projection screen.

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